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651 Antikleia (A907 TK)
Classification: Main-belt Asteroid          SPK-ID: 2000651
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 78 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1011150966098926 4.2508e-08  
a 3.021341188545641 1.2434e-08 au
q 2.715837982374401 1.295e-07 au
i 10.75969474811964 4.494e-06 deg
node 38.00330952831843 2.1244e-05 deg
peri 354.3410576567202 2.8857e-05 deg
M 155.8725068713277 1.9849e-05 deg
tp 2458169.951299335798
(2018-Feb-20.45129934)
0.00010441 TDB
period 1918.218537961505
5.25
1.1841e-05
3.242e-08
d
yr
n .1876741324701057 1.1585e-09 deg/d
Q 3.326844394716882 1.3691e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2682  
   data-arc span      42044 days (115.11 yr)  
   first obs. used      1905-05-07  
   last obs. used      2020-06-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .38409  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:18:17  

Additional Information
 Earth MOID = 1.72229 au 
 Jupiter MOID = 2.10877 au 
 T_jup = 3.212 
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Orbital Elements at Epoch 2456216.5 (2012-Oct-16.0) TDB
Reference: JPL 78 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09844689083137638 4.2434e-08  
q 2.725566829030407 1.2876e-07 au
tp 2456258.861424209822
(2012-Nov-27.36142421)
0.00010552 TDB
node 38.19231116022079 2.1199e-05 deg
peri 356.0155213385081 2.9199e-05 deg
i 10.77046752065828 4.4953e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2682  
   data-arc span      42044 days (115.11 yr)  
   first obs. used      1905-05-07  
   last obs. used      2020-06-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .38409  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:18:17  

Additional Information
 Jupiter MOID = 2.10877 au 
 T_jup = 3.212 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.800646256171653E-15 -5.443547335128313E-15 -1.046721845091439E-12 1.701983328048544E-15 -2.504861886661432E-13 -6.208777429120101E-16
q -5.443547335128313E-15 1.657977986768941E-14 3.240685898984421E-12 -4.912490359537455E-15 7.699215131204156E-13 1.91651919593031E-15
tp -1.046721845091439E-12 3.240685898984421E-12 1.113348964730042E-8 9.140928472387257E-12 2.136355187836523E-9 -4.133044616789584E-12
node 1.701983328048544E-15 -4.912490359537455E-15 9.140928472387257E-12 4.493985613225205E-10 -4.391702569807381E-10 -2.499763263896804E-11
peri -2.504861886661432E-13 7.699215131204156E-13 2.136355187836523E-9 -4.391702569807381E-10 8.526009927293176E-10 2.379529813274284E-11
i -6.208777429120101E-16 1.91651919593031E-15 -4.133044616789584E-12 -2.499763263896804E-11 2.379529813274284E-11 2.020783145600083E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 10.1   n/a MPO502159 IRAS observations used: 3
diameter diameter 31.895 km 0.121 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 20.299 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Sada, P.V.; Canizales, E.D.; Armada, E.M. (2005) Minor Planet Bull. 32, 73-75.]
[Galad, A.; Kornos, L. (2008) Minor Planet Bull. 35, 144-146.]
[Behrend, R. (2012) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.172   0.020 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.847   0.026 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=7.51, mean=12.06, max.=19.67) deg.
U-B UB 0.489   0.030 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=7.51, mean=12.06, max.=19.67) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices

651 Antikleia (A907 TK)          Discovered 1907-Oct-04 by Kopff, A. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 A907 TK = 1957 JF1 = A905 JB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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